CAJ | 학술논문

大煤柱内沿空掘巷是基于工作面双U型巷道布置方式提出的一种新技术，本文针对其具体生产地质条件，运用极限平衡理论、数值分析和现场实践相结合的方法，得出大煤柱内沿空掘巷窄煤柱合理宽度的确定方法，即从上区段采空区侧向支承应力分布规律和煤柱应力分布、巷道围岩应力分布、巷道围岩塑性区分布、巷道围岩变形与煤柱宽度的关系及窄煤柱宽度的极限平衡理论计算6个方面综合考虑窄煤柱的宽度，最终确定窄煤柱宽度为5 m，并深度分析了本区段工作面回采对窄煤柱和宽煤柱围岩应力分布规律的影响。
대매주내연공굴항시기우공작면쌍U형항도포치방식제출적일충신기술，본문침대기구체생산지질조건，운용겁한평형이론、수치분석화현장실천상결합적방법，득출대매주내연공굴항착매주합리관도적학정방법，즉종상구단채공구측향지승응력분포규률화매주응력분포、항도위암응력분포、항도위암소성구분포、항도위암변형여매주관도적관계급착매주관도적겁한평형이론계산6개방면종합고필착매주적관도，최종학정착매주관도위5 m，병심도분석료본구단공작면회채대착매주화관매주위암응력분포규률적영향。
Gob entry driving in the large pillar is a new technology based on double U-shaped roadway layout of the face. According to the geological conditions, certain method of reasonable width of narrow pillar in gob entry driving in the large pillar is obtained based on the combination of limit equilibrium theory, numerical calculation and field practice. It takes into account six parameters for the narrow pillar width from distribution of stress of the section of the lateral support goaf, stress distribution of coal pil-lars, stress distribution of surrounding rock, plastic zone distribution of surrounding rock, the relation-ship between deformation of surrounding rock and pillar width and limit equilibrium theory of narrow pillar width, and finally it is determined that the narrow pillar width is five meters. Then deep analysis is conducted to the impact of stress distribution law between narrow pillar and wide pillar to this section face mining.